How to reach maximum speed in ANT Advanced Burst Mode?

Good day!

Faced with the problem that I didn't get to run N5 Starter Kit (nRF51422) on maximum speed in Advanced Burst Mode, using ANTware II with ANTUSB-m to read packets. For now, maximum speed is 12,8kbps (200Hz * 8 bytes per packet * 8 bits in byte). How can I acheive 60kbps? (I think that is 300Hz * 24 bytes per packet * 8 bits in byte that is 57,6kbps). I have a lot of questions :)

  1. When I read documentation about Advanced Burst Mode, I meet everywhere a sentences about Hardware Signaling and Serial Interface. It's mean that I can't achieve that speed with built-in MCU only, and required external MCU? If so, why? (My current project doesn't imply any additional MCU).

  2. If I increase channel period (more than 200Hz) - the number of errors growth, the speed is slightly reduced. Wrong configuration? Think that I not fully configure Advanced Burst Mode. But I used sample code for it.

  3. All packets are marked as Burst (0x50), but if I enabling Advanced Burst Mode on Advanced Device Panel of ANTUSB-m - one packet goes in Burst (0x50), second in AdvancedBurst (0x72), with 2 bytes of data (ANTUSB-m or ANTwart II combines/rewrites bytes on the fly?). And no matter how I configure it, they always receive or 3 Burst, or combined 1 Burst and 1 Adv. Burst. Need 3 data bytes in 1 Adv. Burst.

LEDS - for oscilloscope. Check time needed for transmit 1 packet (10ms if receiver channel closed, ~15ms if opened).


Predefines:

BOARD_N5DK1, NRF51, ANT_STACK_SUPPORT_REQD, S210, SOFTDEVICE_PRESENT, SWI_DISABLE0


Short Code (not showed uart and twi related code):

#define APP_TIMER_PRESCALER    0      // Value of the RTC1 PRESCALER Register
#define APP_TIMER_MAX_TIMERS   BSP_APP_TIMERS_NUMBER // Maximum Number of Simultaneously Created Timers
#define APP_TIMER_OP_QUEUE_SIZE   2      // Size of Timer Operation Queues

// Channel configuration
#define CHANNEL_0      0  // ANT Channel 0
#define CHANNEL_0_RF_FREQUENCY   0x42u // Channel RF Frequency = (2400 + 66)MHz
#define CHANNEL_0_TX_CHANNEL_PERIOD  164u // Channel period 200 Hz (164u/32768 (sec))
#define CHANNEL_0_ANT_EXT_ASSIGN  0x00 // ANT Ext Assign
#define ANT_PUBLIC_NETWORK_KEY   {0xE8, 0xE4, 0x21, 0x3B, 0x55, 0x7A, 0x67, 0xC1} // ANT Public/Default Network Key
#define ANT_CUSTOM_TRANSMIT_POWER       0u // ANT Custom Transmit Power (Invalid/Not Used)

// Channel ID configuration
#define CHANNEL_0_CHAN_ID_DEV_NUM  1u // Device number
#define CHANNEL_0_CHAN_ID_DEV_TYPE  1u // Device Type
#define CHANNEL_0_CHAN_ID_TRANS_TYPE 1u // Transmission Type

// Miscellaneous defines
#define ANT_CHANNEL_DEFAULT_NETWORK  0 // ANT Channel Network
#define ANT_EVENT_MSG_BUFFER_MIN_SIZE 32u // Minimum size of ANT event message buffer
#define BURST_BLOCK_SIZE    24u // Size of data block transmitted via burst. Must be divisible by 8

void ant_channel_master_setup(void){} // Not showed because don't changed

void SoftDevice_Init(void){
 uint32_t err_code;
 
 // Enable SoftDevice
 err_code = sd_softdevice_enable(NRF_CLOCK_LFCLKSRC_XTAL_50_PPM, softdevice_assert_callback);
 APP_ERROR_CHECK(err_code);

 APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS, APP_TIMER_OP_QUEUE_SIZE, NULL);

 // Set application IRQ to lowest priority
 err_code = sd_nvic_SetPriority(SD_EVT_IRQn, NRF_APP_PRIORITY_LOW); 
 APP_ERROR_CHECK(err_code);

 // Enable application IRQ (triggered from protocol)
 err_code = sd_nvic_EnableIRQ(SD_EVT_IRQn);
 APP_ERROR_CHECK(err_code);

 err_code = ant_stack_static_config();
 APP_ERROR_CHECK(err_code);

 // Setup Channel_0 as a TX Master
 ant_channel_master_setup();
 
 static uint8_t burst_setup[]={ADV_BURST_MODE_ENABLE,ADV_BURST_MODES_MAX_SIZE,0,0,0,0,0,0};
 err_code = sd_ant_adv_burst_config_set(burst_setup,sizeof(burst_setup));
 APP_ERROR_CHECK(err_code);

 uint8_t burst_wait=0; 
 err_code=sd_ant_burst_handler_wait_flag_enable(&burst;_wait);
 APP_ERROR_CHECK(err_code);
}


void main(void){
 uint32_t err_code;
 LEDS_CONFIGURE(LEDS_MASK);
 LEDS_OFF(LEDS_MASK);
 SoftDevice_Init();
 while (true){
  LEDS_OFF(BSP_LED_3_MASK);
  LEDS_ON(BSP_LED_1_MASK);
  for(int i=0; i<BURST_BLOCK_SIZE; i++){m_burst_data[i]=m_counter++;}
  do{
   LEDS_OFF(BSP_LED_1_MASK);
   LEDS_ON(BSP_LED_3_MASK);
   err_code=sd_ant_burst_handler_request(CHANNEL_0, BURST_BLOCK_SIZE, m_burst_data, (BURST_SEGMENT_START | BURST_SEGMENT_END));
  } while (err_code == NRF_ANT_ERROR_TRANSFER_IN_PROGRESS);
 }
}

Thanks in advance!